/****************************************************************************
 * Copyright 2009 Huascar A. Sanchez                                        *
 *                                                                          *
 * Licensed under the Apache License, Version 2.0 (the "License");          *
 * you may not use this file except in compliance with the License.         *
 * You may obtain a copy of the License at                                  *
 *                                                                          *
 *     http://www.apache.org/licenses/LICENSE-2.0                           *
 *                                                                          *
 * Unless required by applicable law or agreed to in writing, software      *
 * distributed under the License is distributed on an "AS IS" BASIS,        *
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
 * See the License for the specific language governing permissions and      *
 * limitations under the License.                                           *
 ****************************************************************************/
package com.gotobject.filter.spi;

import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import java.util.Iterator;

/**
 * convinient class to iterate over a {@link org.w3c.dom.NodeList}
 * @author huascar.sanchez@gmail.com (Huascar A. Sanchez)
 */
public class ElementIterable<T extends Node> implements Iterable<T> {
    private final NodeList nodelist;

    public ElementIterable(NodeList nodelist){
        this.nodelist = nodelist;
    }

    @Override
    public Iterator<T> iterator() {
        return new Iterator<T>() {
            int nextIndex = 0;

            @Override
            public void remove() {
                throw new UnsupportedOperationException();
            }

            @Override
            public boolean hasNext() {
                return nextIndex < nodelist.getLength();
            }

            @SuppressWarnings({"unchecked"})
            @Override
            public T next() {
                return (T) nodelist.item(nextIndex++);
            }
        };
    }
}
